Metal-free nitroxyl radical-mediated β-C(sp<sup>3</sup>)–H amination of saturated ketones with heteroaryl halides: multiple roles of TEMPO
作者:Ping Qian、Yu Deng、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1039/c7cc00145b
日期:——
β-amination of saturated ketones by using heteroaryl halides as amide precursors has been developed. This reaction proceeds through a cascade α-aminoxylation/Cope-like elimination/aza-Michael addition sequence to afford β-amino ketone derivatives with excellent yields. TEMPO plays multiple roles in the current β-amination process, including those of an oxidant, an α-aminoxylation reagent, a β-hydrogen